在下列命题中，真命题是（   ）

方框中所给单词的适当形式填空，使对话通顺、正确。每词仅用一次（每空一词）。

Sandy: Mom, I'm really worried.

Mom: Why? What's the ____?

Sandy: I can't find my schoolbag.

Mom: Well, where did you last put it?

Sandy: I can't remember! I ____ a concert yesterday so it might still be in the museum hall.

Mom: Do you have anything ____ in your schoolbag?

Sandy: No, just my books, my pink hair band and some tennis balls.

Mom: So it can't be ____.

Sandy: Oh, wait! I went to a picnic after the concert. I remember I had my schoolbag with me at the picnic.

Mom: So could it still be at the park?

Sandy: Yes. I left early, before the rest of my ____. I'll call them now to check if anybody has it.

①古老的威尼斯又沉沉地入睡了。____

②两边的建筑物飞一般地往后倒退。____

③威尼斯的小艇行动轻快灵活，仿佛田沟里的水蛇。____

若关于x的一元二次方程$\left(m-1\right)x^2+5x+m^2-3m+2=0$有一个根为0，则m的值等于（   ）